NEWTON, Mass., March 31 /PRNewswire/ -- TripAdvisor®, the world's most popular and largest travel community, today announced its quirkiest U.S. accommodations, according to TripAdvisor editors and travelers. From sharing a bedroom with King Tut to waking up among tigers, these properties offer truly unique places to stay. And TripAdvisor travelers seem to enjoy a little "quirk" with their lodging: 76 percent who described a hotel as "quirky" also rated it either 4 or 5 (out of 5) on tripadvisor.com.

Catching some Zs in class was previously frowned upon, but no longer: guests are encouraged to snooze and relax at this elementary school-turned-quirky hotel where the guestrooms were once classrooms – still complete with chalkboards today – and the auditorium is now a movie theater. And at an average of $104 a night, it's an inexpensive education. According to one TripAdvisor traveler, "This 'hotel,' if you can call it that, is the perfect experience while in Portland...We had so much fun roaming the hallways and exploring the premises."

Forget you won't after a night spent in a restored Alaska Railroad car with views out over Fairbanks, Alaska, and the Alaska Mountain Range. Completely authentic, one was even a hospital car from World War II. One TripAdvisor traveler said, "Getting to see and sleep in a real car was a great experience. It was also nice to have an entire railroad car to ourselves!"

Man's best friend becomes traveler's best friend at this very unconventional Idaho inn where not only is the entire building shaped like a giant dog, but carved dog statues made by the owner, a headboard covered in carved dogs, and plenty of real furry friends all make this a truly canine-oriented lodging treat. One TripAdvisor traveler said, "The head is a loft bedroom filled with games, the body is another bedroom and bathroom, and you're the only ones in it!"

No dank, dark quarters here – in this unique sandstone lair carved out of the side of a cliff, travelers can have their cave and heat it, too: the earthy atmosphere is paired with warm, inviting accommodations and the luxuries of home. According to one TripAdvisor traveler, "Seriously, how neat is it to stay in a cave? A really PLUSH cave with all of the amenities."

The eccentric suites at the Victorian Mansion at Los Alamos range from "Gypsy" to "Pirate" to "Fifties" themes. Adorning the Egyptian Suite are Persian rugs, images of the desert, and even a life-size sarcophagus of King Tut himself, hiding a surprise for guests. One TripAdvisor traveler recalled, "I laughed every time I pulled King Tut's beard to open the hidden bathroom."

Lions and bobcats and cougars, oh my! Not for the faint of heart, Turpentine Creek gives travelers the chance to get up close and personal with nature's big cats. The animals are housed in enclosures right outside several of the rooms, giving travelers access to incredible sights...and sounds! As one TripAdvisor traveler recalled, "Hearing the cats roar at night is something you just can't find elsewhere!"

"Have you slept in a Wigwam lately?" asks the Wigwam Motel's front sign, enticing travelers to spend a quirky but comfortable night in one of the motel's Wigwams along Route 66. According to one TripAdvisor traveler, "To add to the authenticity, in front of every wigwam sits a different historic automobile. It was a great experience which provided us with a unique and lasting memory!"

Travelers nostalgic for the Wild West will enjoy sleeping in a covered wooden wagon in the Wagon Wheel Villa, or enjoying the enormous and aptly-named Hacienda Villa, complete with whirlpool tub beside a terracotta fireplace. To top it off, this quirky accommodation has breadmakers in each of its 15 unique, historical villas. One TripAdvisor traveler recalled, "We stayed in the French Quarters... the room looks like you stepped into a little French town."

In Bisbee, Arizona, there are nine small places where the '50s are alive and kickin' – nine vintage travel trailers outfitted to look like an authentic '50s diner, a "Polynesian Palace," a yacht, and more. With LPs spinning on the old record player and lawn flamingos out the door, this property turns back the clock. One TripAdvisor traveler said, "What a fabulous and funky step back in time... blonde wood paneling and deco-style lights, phonograph with vintage records, black-and-white TV and retro horror flicks."

A night spent in a true treehouse? Sleeping in a 17,000-pound restored U.S. Coast Guard helicopter? Travelers can do either at this property nestled in the Connecticut countryside, home to a total of 18 whimsical cottages designed by innovative architects. One TripAdvisor traveler said, "Next door was the 'Helicopter' cottage, with a vintage Sakorsky helicopter in the room. Incredible."

"Quirky appears to be 'in' in 2010, with these off-beat properties among the most beloved by our members," said Christine Petersen, chief marketing officer for TripAdvisor. "From uniquely themed villas to wacky dog-shaped inns, these odd accommodations can be a really fun way to spice up a vacation."

TripAdvisor and the TripAdvisor logo are registered trademarks of TripAdvisor LLC in the U.S. and/or other countries. Other logos or product and company names mentioned herein may be the property of their respective owners.